Histogram distributions (solid curves) for the Stokes V line ratio along a vertical cut through the scatter-plot diagrams within a |V|₆₃₀₁ bin centered at 0.95% polarization. The dashed-dotted curves represent 2-component Gaussian decompositions, with each Gaussian given by the dotted and dashed curves. The center positions of the two Gaussians are marked by the vertical dotted and dashed lines. The top and middle panels are derived from the top and bottom scatter plots of Fig. 1, while the bottom panel represents the case with no masking.